If you've ever been unsure about just how many pizzas you need to get to feed your crew, Reddit has the answer. One savvy user posted a tweet that pointed out buying two 12-inch pizzas will actually yield you less pizza than if you just buy one 18-inch pizza. It's math, y'all. However, if you are a fan of crust, the two 12-inch pizzas are your best bet.Other Reddit users chimed in with their pizza-related questions and comments, with one commenter saying that at his pizza shop, the deals for two smaller pizzas always get more people in the door, even though it's less pizza. "Two large/medium for $X.99 each SOUNDS better than the higher sticker price on one big pizza. We've run deals on the big pizzas and they are never as popular as a 2-for deal," tactics14 explained.Well, there you have it, folks. The next time you need to calculate your pizza order, all you'll need is the formula for pi ... or some smart social media users.

If you've ever been unsure about just how many pizzas you need to get to feed your crew, Reddit has the answer. One savvy user posted a tweet that pointed out buying two 12-inch pizzas will actually yield you less pizza than if you just buy one 18-inch pizza. It's math, y'all.

However, if you are a fan of crust, the two 12-inch pizzas are your best bet.

Depends on the quantity that matters to you: if you just want maximum pizza area, go for the larger size. (Doubling the radius gives quadruple the area!) But some people like the crust most (for reasons I cannot comprehend), in which case the smaller pizzas are a better option...

Other Reddit users chimed in with their pizza-related questions and comments, with one commenter saying that at his pizza shop, the deals for two smaller pizzas always get more people in the door, even though it's less pizza.

"Two large/medium for $X.99 each SOUNDS better than the higher sticker price on one big pizza. We've run deals on the big pizzas and they are never as popular as a 2-for deal," tactics14 explained.

Well, there you have it, folks. The next time you need to calculate your pizza order, all you'll need is the formula for pi ... or some smart social media users.